Grinding machine



Apr. 24, 1923.

4 Sheets-Sheet 1 R HERVIG GRINDING MACHINE I L ILII U IIHI UIII IIIIIIIII 1 Filed March 21 IN V E N TOR: Ric/2am? Herm' N /T TOR/Vi).

Apr. 24, 1923. r 1,452,509

. R. HERVIG GRINDING MACHINE Filed March 21, 1922 4 Sheets-Sheet 2 I 1 11 17 a AZ,

1 I 1 lA/Vf/VTOR.

- R. HERVIG GRINDING MACHINE Apr. 24, 1923 1,452,509.

Filed'MaICh 21, 1922 4 Sheets-Sheet 5 f? is]: a m .Hermy A 51 mg flT TORNEX Patented Apr. 24, 1923.

hurra STATE s; PATENT or FICE.

RICHARD HERVIG, OF CHICAGO, ILLINOIS, ASSIGNORTO AMERICAN CAR AND FOUNDRY COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW. JERSEY.

GRINDING MACHINE.

Application filed March 21, 1922. Serial No. 545,457.

To all whomz't may COW/06TH.

Be it known that I, RICHARD HERVIG, residing at Chicago, Cook County, State of Illinois, and being-a citizen of the United States, have invented certain new and useful Improvements in a Grinding 'Machine,

of whichthe following is a full, clear,and

of construction shown and described, as it is obvious that various modificationsithereof within the scope ofthe claims will occur to persons skilled'in the art. 9 i

In said drawings: Fig. 1 is a side elevation of myimproved grinding machine, part .being'broken away to show details;

, Fig. 2 is a front elevation of my device, .the'tail stock being broken away and the head stock and grinding spindle bearings and grinding wheel casing being shown in section; v

Fig. 3 is atop plan view with the tail stock and a gear casing shown in section; Fig. 4 is a vertioal'section, taken on line 4-4 of Fig. 5, showing part of the operating and adjusting mechanism;

Fig. 5 is a vertical section taken on the line 5-'-5 of Fig. 4; 7

Fig. 6 is a detail sectional view of apart "of the operating mechanism; and

' Fig. '7 is a detail sectional view of ,a part of themeans for operating the cross slide. it is an object of my invention to provide an improved grinding machine and, more particularly, to provide an improved means 'for operating the table carrying the head and tail stocks of a grinding machine. 'It-is also an object of my invention to provide a means whereby a table of the kind described may have its extreme positions and its length of movement varied when operated by an operating means having 'a uniform stroke. 1

' With these and other objects in view, my

deviceoomprises a suitable base 1 carrying the table 2, of'a cross slide, mounted fortreciprocation '0I1'tl16 base 1 and havingmounted thereon bearings 3 supporting a spindle 4. The spindle4 isdriven by a pulley 5 and carries a grinding wheel 6 which rotates in a shield/7. VVater'for the wheel 6 issupplied by a pipe S supported by a bracket 9 attached to the shield 7. base 1 for reciprocation at right angles to the line of movement ofthe table 2 is a table 10 having a head stockll anda tail stock 12 adjustably secured thereto by bolts 13,]the heads of which engage in a slot cut in the surface of the table 10. The head stock 11 comprises a. spindle 14 carrying a face plate'15 and a pulley 16 and supported in bearings 17 while the tail stock comprises. p a plunger 18, pressed forward by a spring .19 and adapted to be retracted by a lever 20.

. In order that the table 2 may be reciprocated on the base 1, there is secured to the underside of the table 2 a rack 21 that engagesa gear 22 on a shaft 23 mounted in bearings carried by the base 1. Mounted on the shaft 23 is a wormwheel 24 engaged by a worm 25 on a'shaft 26 mountedon bear- Mounted 0n the ings in the base 1. A hand wheel 27 serves to operate theshaft 26 and through the worm 25, gears 24 and 22-and rack 21, to reciprocate the grinding wheel 6 on the base 1. To steady the operation of the grinding wheel, a weight 28 is attached to the table 2 by a cable 29 passing over a pulley 30 carried in a'bracket 31 securedto the base 1. To reciprocate the'table lOthereis pro- .vided a'lever 32 journaled, at one end, on a stub axle 33 mounted in a boss 34 cast integralwith the base 1. The lever 32 is pro vided with a rectangular slot 35, interme-. diate its ends, in which slides a rectangular bearing block 36. Journaled in the block 36 is a crank arm 37 carried by a gear 38 that is mounted on a shaft 39 journaled in a bearing'40 formed in the base 1. Engaging thegear 38 is a pinion 41 mounted on a sleeve 42 that is supported on bearings'in the base 1 and is provided with a hand wheel 43. Rotatably' mounted. in the sleeve 42 and inbearings in the base 1 is a shaft 44 carrying a gear 45 and having a reduced and screw-threaded end 46. Mounted on the threaded end 46 isa clutchmember 47 having a conical surface that'is adapted to ensleeve 42. Engaging with the gear is a gear 48 mounted on a shaft 49. The shaft 49 is supported in hearings in the base 1 and carries a pulley 50 so that the table 10 may be operated from any suitable source of power as well as by means of the hand wheel 43.

If the table 10 were connected .7 directly to the lever 32 the extent of the movement of the table 10 and the extreme positions assumed by the table would be uniform as the extent of the movement of the lever 32, when operated by either the pulley 50' of the hand wheel 43, is uniform; so in order that the amount of movement and the extreme positions of the table 1O may be varied, the upper end of the lever '32 is provided with a rectangularslot 51 in which a) rectangular bearing block, 52 is adapted tosl'ide. The lever 32 and block 52 are received between the downwardlyprojecting arms 53 and 54 formed integral with the table 10 and adapted to travel in an opening 55 in the base 1. Mounted in the arms 53 and 54, so as to travel in a slot 56in the base 1, is a tubular sleeve 57 having a cylindrical portionrotatably mounted in an opening 58 in the arm 58 and a cylindrical portion 59,

of smaller diameter, rotatably mounted in a bushing 60 that is held against rotation in theopening 61 in thearm 54 by the key 62. iheportion 72 of the sleeve 57 that passes through the bearing block 52 is also oylindricalbut'its axisis displaced with respect to the axis of the rest of the sleeve, but parallel thereto, and the portion of the sleeve that projects beyond the base '1 is provided with a hand wheel 63 by which the sleeve 57 may be operated. Slidably mounted in the bore 64 of the sleeve 57 is a plunger 65" which has a reduced portion 66 projecting tl'irough 'a plug 67 which closes the bore 64 and threaded its outer end to receive an adjusting nut 68. The plunger 65 is held against rotation in the sleeve 57 by a key 69 and has fixed thereon. a toothed clutch member 70 adapted to engage correspondingly shaped teeth formed in the outer face of the bushing 60. Rotation of the nut 68 in one direction will cause the plunger 65 to travel in the sleeve 57, against the action of spring 71 so as to bring the clutch member 70 into engagement with the bushing 60 and the sleeve 57 will be held against rotation with respect to the arms 53 and'54. Rotating the nut 68 in the opposite direction will release the plunger 65 sothat the spring 71 may slide the plunger in the sleeve 57 and disengage the clutch member 70 from the bushing- 60. With the clutch member 7 0 disengaged from the bushing 60 the sleeve 57 may be rotated in the arms 53 and 54 causing the portion 72 of the sleeve 57 to act as a cam and to shift the bearing block 52 with respect to the lever 32 and with respect to the arms 53 and 54. It s 53 and 54, with respect to the lever 32, will I be changed so that the position of the table 10 at each limit of its movement Will be changed. It will-also be noted that as the axis of the portion 72 is shifted to one side or the other of a horizontal plane through the axis of the remainder of the sleeve 57 that the bearing block 52 will be moved the slot 51 in the lever 32, thus varying the effective length of the lever 32 andvarying the amount of movement of the table 10. It will also be noted that every adjustment of the portion 72 causes an adjustment of both the position of the block 52 in, the slot 51 and the position of the arms 53 and 54 with respect tothe lever 32 so that'means are pro vided whereby the limiting positions and movement of the table 10 may; be readily adjusted. It will be apparent that the table 10 may be given the same extent of movement' from different extreme positions or different extents of movement from the same extreme position or from differentextreme positions. i

What I claim is i 1. In a grinding machine, a table, a slotted oscillating lever having a uniform movement, a bearing block slidable in said slot and means carried by said table adapted to shift said block in said slot to vary the movement of said table.

2. In a grinding machine, a reciprocating table, a slotted oscillating-lever having a uniform movement, a bearing block slidable in said slot and a. rotatable cam carried by said table and adaptedtoshift saidbl-ock in I said slot and to shift saidtable with, respect to said lever.

3. In a grinding machine, a, table, arms projecting from said table, aslotted oscillating lever having a uniform, movement, a bearing block slidable in saidslot. a, cam rotatably mounted in said arms and adapted to shift said block in said slot to vary the movement of said table and means for locking said cam against rotation.

4. Ina grinding machine, a table, an oscillating lever for. operating said table and means connecting said table and lever adapted to vary the extent of movement of the table.

5. In a grinding machine, a table, an oscillating lever for operating, said table and means connecting said table and lever. ad-

justable to give movements of said table of the same extent between different sets of extreme positions of said table.

6. In a grinding machine, a table,.an oscillating lever for operating said table and means connecting said table and lever ad justable to-vary the extent of movement and to give movements of the same extent between diflerent sets of extreme positions of said table.

7. Ina grinding machine, a table, a slotted bearing block slidable in said slot, a r0-- tatable member connecting said block and arms and means for locking said rotatable member against rotation. 1

10. In a grinding machine, a table, arms projecting from said table, a lever pivoted at one end, means engaging said lever intermediate its ends and adapted to impart movements of uniform extent to said lever,

a bearing block slidably engaging the lever at its other end, a rotatable member connecting said block and arms and means for looking said rotatable member against rotation with respect to saidarms.

In Witness whereof I have hereunto set my hand in the presence of two witnesses.

RICHARD HERVIG.

Witnesses:

E. W. REnDERsoN, I. L. AUSTENSEN. 

